Rock-crusher



t e Dv h s w e e h S 2 THR.. E NM E Km .-0 LK .w HR m. d o M 0 fN\ fewf INVEIVTH ze@ Patented Sept. Z0, 1892.

WHA/58858.-

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. 2 Sheets-Sheet r2". H. L. KENT. ROOK GRUSHER.

(No Model.)

No. 482,795. Patented Sept. 20, 1892.

NVENT WITNEEEEE UNITED STATES PATENT OFFICE.

HORACE L. KENT, OF BOSTON, MASSACHUSETTS.

ROCK-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 482,795, dated September 20, 1892.

Application u'led September 7, 1891. Serial No. 404,975. (No model.)

To aZZ whom it may concern:

Be it known that I, HORACE L. KENT, a citizen of the United States, residing at Boston, in the county 0f Suffolk and State of Massachusetts, have invented a new and useful Rock-Crushing Machine, of which the following is a specification.

The object of my invention is to produce a simple and powerful machine for crushing rock, ores, and similar substances.

In the drawings, Figure l is a side elevation of the machine of my invention, partly broken away to show the interior construction. Fig. 2 is a front elevation with the rim cut away. Fig. 3 is a horizontal section, line 3 3, Fig. l. Fig. 4 is a transverse vertical section, partly in elevation, line 4 4, Fig. 1.

Similarlettersrefer tosimilar parts throughout the several views.

In the drawings, A is the main or driving shaft of the machine and turns in bearings B B. Said bearings have cast upon them the cylindrical slides C C, fitting in recesses D D in the frame E. Spiral springsF F bear against the ends of the slides C C and are adjusted by means of set-screws H H and plates G G. The set-screws I I in frame E act as adjustable stops for the sliding bearings B B. The shaft A is driven by a pulley J and has keyed or fastened to it the roll K, which turns in space L between the two sides of the frame E. Surrounding the roll K is a I'ing or hollow cylinder M. The roll K bears against the inner surface or periphery of the ring M, and against the outer surface of said ring are placed friction-rolls N N N, fixed to shafts O O O, turning in bearings 011 frame E, said bearings being provided with packing ff to keep out the dust, which in machines of this class is excessive, and without this packing said dust would pass out of the space L between the frames and into the bearings of the shafts, clogging and wearing the latter to a great extent, and thus lessening the life of the machine. The material to be ground is introduced through the opening P in the frame E. The roll K turns in the direction indicated by lthe arrow, and the material is thus carried forward until it is caught between the roll K and the ring M, causing the ring to revolve around the roll K, as indicated by the arrow. The rollsN N N form a bearing for the ring M to turn upon. It is evident that by the combined rotation of the roll K and the ring M the material to be operated upon will be gripped between the two with much greater force than if the ring were iixed. After the rock has been ground between the roll and ring it falls over the sides of the ring into the recesses S S, formed in the sides of the frame E, and out at the opening T, as indicated by the arrows, Fig. 4. It is evident by this arrangement of the exitopenings S S, immediately adjacent to the revolving ring M, that the rock which has been crushed falls over the sides of the ring immediately into said openings without danger of clogging the machine, and, furthermore, by this relative arrangement of the exit-openings to the ring the necessity of distributing-fans and the power necessary to drive them is done away with. The two sides of the frame E are connected by slay-bolts. The space L between the frames is inclosed by a rim or cover U. By lthis arrangement the frame forms a guide to prevent lateral play of the ring M and, in combination with the rim or cover U, completely incloses the chamber or .space L, so that the dust is kept confined in the machine.

It is evident thatif any foreign substancesuch as ironshould be introduced between the roll and ring the former will be pushed back and by the yielding of the springs the machine will not be broken.

By adjust-ing the screws I in one direction or the other the space between the roll K and ring IWI may be increased or diminished, and hence the material in passing through may be ground coarse or fine, as desired.

What I claim, and desire to secure by Letters Patent, is

In a rock-Crusher, the combination of the roll K, supported in sliding bearings, the revolving ring M, and friction-rolls N with the frame E, provided with recesses S and the cover U, substantially as described, for the purposes specified. t

HORACE L. KENT.

Witnesses:

CHAs. L. GooDING, THOMAS H. SEELY. 

